Home-grade energy buffering + thermal storage

Turn surplus power into stored hot water.

MI-HWC captures excess solar/off-peak energy, buffers it with magnetic inertia, and converts it into hot water storage. Quiet, intelligent, and designed for real utility rooms—not lab benches.

Quiet cooling + heat recovery Smart DHW scheduling Serviceable modular layout
MI-HWC Home-Grade
Thermal Recovery on
1–2 kW continuous thermal charging (home-grade)
0.3–0.8 kWh inertia buffer for smooth power flow
4–9 kWh typical DHW storage (50 gal, ΔT dependent)

How MI-HWC works

A flywheel buffers rapid power fluctuations while your hot-water tank stores energy for hours. The controller prioritizes safety, comfort, and cost—then routes recovered heat where it matters.

Capture

Absorb surplus PV or off-peak power and stabilize spikes on a 48V DC bus.

Buffer

Magnetic inertia smooths short bursts so heating stays stable through dips and clouds.

Store

Route recovered heat into your water tank—your safest, cheapest “battery” at home scale.

Built for real installations

Quiet cooling, modular serviceability, and smart controls designed around utility rooms, electricians, and plumbers.

Heat-first routing

Priority routing sends waste heat into DHW via brazed plate HX—radiator only when tank is satisfied.

Installer-friendly

DIN rail layout, labeled harness runs, quick-service pump and filter access, and standard plumbing connections.

Smart scheduling

Supports off-peak heating windows, PV surplus biasing, and a weekly pasteurization cycle.

Quiet operation

Large radiator area + low-RPM fans + liquid spreading keeps acoustic profile under control.

Data & diagnostics

Temperature, flow, pressure, and current sensing with event logs for service calls and tuning.

Safety-led control

Derate and controlled spin-down logic for over-temp, low-flow, and fault conditions.

Core specifications

These are the home-grade engineering targets for the MI-HWC unit. Production variants can scale up.

Electrical 48V DC bus
Thermal charge power1–2 kW continuous (3 kW peak)
Motor-generator3 kW cont / 5–6 kW peak
DC protection100A breaker + contactor + precharge
Controls power24V + 12V auxiliary rails
Thermal Heat recovery
CoolantPG-40 (propylene glycol mix)
PHE heat transfer~3 kW @ ΔT 10K (target)
Loop temperature35–45 °C typical (≤ 60 °C max)
Noise target< 35 dBA @ 1m
Inertia buffer Smooth power flow
Flywheel buffer0.3–0.8 kWh mechanical
Rotor design speed≤ 6,000 RPM (home-grade)
Balance classISO 1940 G 6.3 or better
Touchdown bearingsHybrid ceramic 6204 class
Hot-water integration Standard plumbing
Tank40–80 gal electric (typical 50 gal)
Thermal storage4–9 kWh usable (ΔT dependent)
Mixing valveASSE 1017 tempering (49–55 °C)
PasteurizationWeekly 60–62 °C cycle

Want the full spec sheet + BOM?

We can provide a commissioning checklist, wiring diagram, and installation kit list for your installer.

Request installer kit Request pricing

Performance planner

Estimate how much hot-water energy MI-HWC can capture based on your tank size, temperature rise, and available surplus power.

Total hot-water energy storage (kWh)
Estimated time to fully charge tank
Daily energy captured during surplus window
Estimated daily value at selected rate

Estimates assume 100% transfer efficiency for simplicity. Final performance depends on plumbing layout, tank insulation, and control tuning.

Safety & reliability

Designed with layered protections: sensing, derate control, and controlled spin-down for fault events.

Thermal derate

Automatic staged power reduction if inverter baseplate, bearings, or chamber temps trend high.

Low-flow detection

Flow/ΔT monitoring triggers protective modes if cooling performance drops or pump fails.

Controlled spin-down

Brake + controller logic brings rotor to safe speed without abrupt stops or mechanical shock.

FAQ

Quick answers to common questions for homeowners, installers, and early adopters.

Is MI-HWC a “free energy” device?

No. MI-HWC stores and manages energy. The flywheel is a buffer; the water tank is the long-duration storage.

What does it work with—solar, grid, or both?

Both. It can bias charging to PV surplus or off-peak grid windows, depending on configuration and local rules.

How much energy can it store?

The flywheel buffers short intervals (0.3–0.8 kWh). Your tank stores the bulk energy (typically 4–9 kWh usable).

Is it loud?

Designed to be quiet: liquid cooling + large, low-RPM fans. Target is under 35 dBA at 1 meter in steady state.

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Ioncore Energy Ioncore Energy Magnetic Inertia Systems